Foulant Stability Measurement in Hydrocarbon Fluids
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Solution Overview
Problem
Current methods struggle to accurately analyze the stability of foulants and foulant inhibitors in hydrocarbon-based fluids under real-field conditions, leading to inefficiencies and increased costs due to foulant deposition and equipment failures.
Innovation Solution
Centrifuging a hydrocarbon-based fluid sample and applying near-infrared laser light to measure transmittance, with a detector, to determine foulant stability by comparing centrifuged and non-centrifuged samples, and optionally using solvents to adjust viscosity and analyze flocculated particles using techniques like light scattering or videomicroscopy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional methods are used to analyze foulant stability, then the analysis can be performed with simple equipment, but the measurement accuracy and reliability under real-field conditions deteriorates
Solution Approach 1:
The measurement system is segmented into distinct functional modules: a centrifugal separation module to simulate field conditions and concentrate foulants, and an optical detection module using laser light scattering to measure foulant properties. This segmentation allows each module to be optimized independently, achieving high measurement precision while maintaining manageable system complexity.
Solution Approach 2:
The centrifugal separation is performed as a preliminary action before optical measurement to concentrate foulants and simulate real-field deposition conditions. This preliminary concentration step ensures that subsequent optical measurements occur under conditions representative of actual fouling scenarios, significantly improving measurement accuracy and reliability.
2Reliability
If centrifugal separation is applied to simulate field conditions, then the measurement reliability improves, but the measurement time and process complexity increase
Solution Approach 1:
The centrifugal separation parameters (rotational speed, duration, temperature) are optimized to achieve sufficient foulant concentration and simulation of field conditions within a minimized time frame. By carefully controlling these parameters, the system achieves high measurement reliability without excessive time loss, balancing centrifugal processing time against measurement accuracy requirements.
3Measurement precision
If laser light scattering is used to detect foulant particles, then the detection sensitivity improves, but the device complexity and cost increase
Solution Approach 1:
The centrifugal separation acts as an intermediary that concentrates foulant particles into a configuration optimal for optical detection. This intermediary step enhances the effectiveness of the laser light scattering detection by ensuring sufficient particle concentration and proper distribution, thereby improving detection sensitivity while allowing the use of a relatively simple optical system rather than requiring complex instrumentation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method provides more accurate foulant stability measurements closer to field conditions, allowing for better assessment of foulant inhibitors and reducing fouling-related issues and costs by identifying effective additives for dispersion and stability.
Implementation Method 1
centrifuging the hydrocarbon-based fluid sample
Implementation Method 2
analyzing the number or size of flocculated foulant particles by a technique, such as but not limited to, light scattering
Data Source
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AI summary
A stability of at least one foulant within a hydrocarbon-based fluid sample may be determined where the hydrocarbon-based fluid sample may have or include, but is not limited to a hydrocarbon fluid and foulant particles. The fluid sample may have a viscosity ranging from about 0.5 cSt (0.5 mm2/s) to about 5000 cSt (5000 mm2/s). The hydrocarbon-based fluid sample may be centrifuged, and a laser light (in the near-infrared region) with a detector may be applied to the hydrocarbon-based fluid sample. At least one transmittance measurement from the laser light passing through the hydrocarbon-based fluid sample may be used to measure foulant flocculation. A foulant stability reserve measurement may be obtained by comparing a first transmittance measurement of the centrifuged hydrocarbon-fluid sample to a second transmittance measurement of a non-centrifuged hydrocarbon-fluid sample.